Device for pressing the doors of ovens against their seats.



' P. RIEGKE. DEVICE FOR PRESSING THE DOORS OF OVENS AGAINST THEIR SEATS.

- APPLICATION iiLsn'nno. 11, 1909.

2 SHEETS-BHEET jijg/nfo r 0% Jfiorney & a

I wl neses P. RIEGKE. v DEVIGE FOR PRESSINQ THE DOORS 0F OVENS AGAINST THEIR SEATS.

' APPLIOATION FILED DEO.11, 1909.,

962,669.; Patnted June 28', 1910.

2 SHEETS-SHEET 2.

giant- Imps] jrzVerz for M jzfome 19 h eonslderable" length and conse-- tly pressure at "the upper or lower end 2O 1 IN ITED STATES PATENT OFFICE. PAUL nmc m, or DESSAU, GERMANY, AssIGNon 'ro orENBAU-eEsELLsoisLArr aanscnnenx'rnn HAFTUNG, or MUNICH, GERMANY,- A oonronngrronor GER- I MANY.

DEVICE FOR ranssrne THE DOORS or ovENs AGAINST imam-sears.

Specification of Letters man.

; Patented Jnne 28,1910.

Application filed December 11, 1909. Serial No. 532,690.

To all whom it may concern:

Be it known that I, PAUL RIEGKE, chief engineer, a subject of the Emperor of Ger- ,This invention relates to mechanism for pressing doors or covers on to their frames or. seats and 1s partlcularly applicable for use 111 connection Wlth the doors of ovens or gas-retorts. I

The gas-tight closing of doors, which in modern retorts orevens are of large dimensions, offers special difficulties, since the or t'b'othends only does not insure a thorgughly gas-tight joint between the door and its frame. To overcome this difficulty, it

hasalready been suggested to provide ten-i sion bows on the door which extend over the whole length thereof and are brought into contact with the door by means of eccentrics,

by the turning of which a local pressure can a be exerted on-the body of the door. With mechanism of this nature the turning of the eccentrics not only presses the door body forward against its seat, but tends simultaneously to displace it to-a small extent in a longitudinal direction by the lateral thrust of theccentr'ic. I If now the uppermost eccentric is first tightened, it can exert its full effect'upon-the door body. But in tighten- -ing the next eccentric below the door body' which has been somewhat displaced in a 1011- gitudinal direction by the turning of the first bolt, cannot follow the lateral thrust of. the

second eccentric, sothat the latter can exert no appreciable pressure upon the door body. The case is the same when the other eccentries are turned 'so that the door isv notain reality pi'essedagainst its frame by the'ec eentrics with an equal pressure at ttfe various placeswhere the. eccentrics are arranged.

The object of .thepresentimproslement is topreventlongitudmal displacement of the door to be closed, and according/to this invention the eccentrics, while being turned, bear on'slide shoes either on the door body or on the inner s1de ofthe-te 'o,n bows, ac-

cording as the said eccentrics not their beer ,eral thrust only produces movement of the e .6 5 Several constructions of the mechanism slide shoes.

according to this invention are shown in the accompanying drawings, in which, I

Figure 1 is a front view of a rectangular gas-retortdoor provided with eccentrics arranged 1n pair's on either slde of the central axis thereof, Fig. 2 1s a cross section on an enlarged scale on'the' line 2-2 of Fig. 1, Fig. 3 is a longitudinal section on the line 3-3 of Fig. 1, Fig. t shows the-upper part of Fig. 3 on'an enlargedscale, Fig. 5 is a front elevation of the upperpart of a modified'form of the door, the =ecentrics being mounted on the door and engaging slideshoes on the tension bows, Fig.6 is a cross section on the line6 6.of.Fig. 5 Fig. 7 is a longitudinal section on an enlarged scale on the line 7-7 of Fig. 5, Fig. Sis a frontelevationofthe upper part of a third form of the door,the eccentrics being arranged in one line and ournaled on the door, Fig. 9 is a cross section on the line 9 9 of .Fig. 8,

and Fig. 10 is a longitudinal section on an enlarged scale on the line 10-10 ofx-iFig'l 8. In Figs. 1 to 1, the pressing mechanism is 'mounted onthe door 3 which bears against a frame 2,- set in a gas'retort or chamber'l.

The door 3 has longitudinal tension bows 4,

connected t6 it by means of distance pieces .5, mounted at right angles to theface of the door and having longitudinal slots-6 receiving horizontal-bolts .7 on the tension bows 4.

The tension bowsd of which two, arranged parallelto each other, are'shown in Figs.

1 1, have on their. upper ends-angle, members 8 provided 'with eyes 9' journaled on horizontal pivots 10, aboutwhi'chthe door;

-' 3 can turn. As prior constrnctionslthe lower ends of the-tension'bows 4 terminate I irwangle members 11, which are connected with each otherby a cross-bar 12 and are formed on their \under surface as toothed racks 13.. Pinions 14 keyed on a shaft 15,

jonrnaled in the lowerpart of the side pieces racks 13 and a worm wheel. 17 ,keyed onthe 16 of the door frame 2,-e1f1gage the toothed center of the shaft 15,-engages a worm 18 journaled in the lower part of the door frame 2, so that the worm wheel 17 and the pinions' 14, on the same shaft, can be rotated by the worm 18, and the'toothed racks 13 thus be moved toward or away from the doorframe 2. To press the door 3 firmly to the frame 2, the shafts 20 of eccentrics 19, whlch are symmetrically arranged, according to 7 Figs. 1-4, at both sides of the bows 4: and

are journaled above each other at predetermined distances in the bows 4, are provided with handles2l. The pressure of the eccen-.

tries 19 on the door body 3 is transmitted through shoes 22, in the eyes 23 of which the eccentrics are mounted. The slide shoes 22 either are free to move relatively to the door or may slide over. bearing surfaces 24 on the door 3, as shown in Figs. 1-4. I I

The above construction enables theeccentries-19, which are spaced at suitable distances, to exert a clamping only between the door body 3 and the tension bows 4;, while naled with their shafts 20 in U-shaped sup' I tension bows 4:. When the eccentrics 19.

' longitudinal direction. Handles 21 are areccentrics in this construction.

be replaced by some other suitable construe-- 'tion.

their lateral thrust causes a displacement of the slide shoes 22 on the bearing surfaces 24:,

'withoutdisplacing the door body proper 3' longitudinally.

In the form shown in Figs. 5 to 7, the eccentrics'19, arranged beneath the tension bows L at both sides of the lat-ter, are jourports 25 'on the door 3, while their slide shoes 22 bear against the'inner side of the are turned to press the door 3 on to its frame, the slide shoes 22 are accordingly displaced on the tension bows 4 in their ranged at both ends of the shafts 20 of the In the arrangement shown in Figs. 8-10, only one tension bow 4, lying above the-center of the door 3, is used, being connected to the door 3 by eccentrics 19 which lie between two vertical ribs 26 of the door 3 and car handles 21 on one end of their shafts 20. The slide-shoes 22 of, the eccentrics 19 bear against the inner side of the bow 4.

.It will be understood that the arrange ment of the slide shoes, cooperating with the eccentrics as described, can be modified in many ways without departing from this invention. Further, the known worm-operated mechanism shown-in Figs. 1 and 2 may What I-claim is v 1.- Ina device for pressing the doors of ovens against their seats, the combination with an oven having an opening and a movable door for closing the" same, of tension members extending over the'door and con- 'nectedto: move in unison. therewith @as the ing made with play" to allow the door a limited movement toward and from the tension member, means for locking the tension door is opened or'clqsed, the connection bei member to the frame, a slide interposed between said door and the tension member and movable relatively to one of them'transversely of the direction in-which the door is movable relatively to the tension member,

and relatively to the other in'a direction in line with the closing movement of the. door,

and means for removing said slide to press the door against its frame.

3. The combination with a door frame and a movable door adapted, to engage, said frame, of a tension member pivoted to the door frame and. carrying the door, the con nection between the door and th t n i member being aleose one so as to allow the door to move toward and from the t i member to a'limited extent, means for looking the tension member to the frame, a slide interposed between the door and the tension member and movable relatively to one of them transversely of the direction in' which the door is movable relativelyto the tension member, and relatively to the other in a direction in line with the closing move-" ment of the door, and means for moving said slide to press the door against its frame.

4. The combination of a door framefa tension member one end of which is 'pivoted'to said frame, means for locking the other end of the tension member to the frame, a door adapted to engage the frame and carried'by the said tension member, the connection beinga loose one to allow the door to move transversely toward and'from the frame to a limited extent when the tension member is locked to the frame, a slide interposed between the door and the tension member and,

movabletransversely .in relationto one of them and lengthwise relatively to the other,

and means for moving said slide to press the door against its frame;

In testimon whereof I hereunto ,aflix my' signature in t e presence of two witnesses.

PAUL RIECKE.

. Witnesses:

HENRY HASP-ER,

. WOLDEMAR HAUr'r.

Co'rrebti ojnsiri Letters Patent No. 962,669.

It is hereby certified that in Letters Patent No 962,669, granted June, 28, 1910,

upon the application 0f Paul Riecke, of Dessan, Germany, feran improvement in"Dev ices for Pressing the Doors of Ovens Against Their Seats, errors appear in the printed specification requiring cerrectiena's follows: Page 2, line 20, after the Word c lalmp ing the word pressure should be inserted, and same page, line 83,'

the word removing she'uldreiid moving; and that the said Letters Patent should be read with these corrections therein that the same may eonform to the record of the caee in the Patent Office.

.Signedandseziledthis12thday ei'July, A. D. 1910. I [SEAL] "j 0.. BILLINGS,

Actz'h 9 Commissioner of Patents. 

